[Android|iOS][Mac] Colors are inverted when texture is compressed with RGBA 16-bit compression

When compressing to RGBA 16 on OSX when in OpenGL editor (not Metal) and build platform is either Android or iOS the Red and Blue channels are swapped.

To reproduce:
1. Open attached project (SpriteCompressionBug.zip)
2. Change the build platform to Android or iOS
3. In Project window, select on of the Sprites
4. Change compression override between none and RGBA 16